mirror of https://git.ffmpeg.org/ffmpeg.git
456 lines
12 KiB
Plaintext
456 lines
12 KiB
Plaintext
\input texinfo @c -*- texinfo -*-
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@settitle ffprobe Documentation
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@titlepage
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@center @titlefont{ffprobe Documentation}
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@end titlepage
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@top
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@contents
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@chapter Synopsis
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The generic syntax is:
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@example
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@c man begin SYNOPSIS
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ffprobe [options] [@file{input_file}]
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@c man end
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@end example
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@chapter Description
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@c man begin DESCRIPTION
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ffprobe gathers information from multimedia streams and prints it in
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human- and machine-readable fashion.
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For example it can be used to check the format of the container used
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by a multimedia stream and the format and type of each media stream
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contained in it.
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If a filename is specified in input, ffprobe will try to open and
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probe the file content. If the file cannot be opened or recognized as
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a multimedia file, a positive exit code is returned.
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ffprobe may be employed both as a standalone application or in
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combination with a textual filter, which may perform more
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sophisticated processing, e.g. statistical processing or plotting.
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Options are used to list some of the formats supported by ffprobe or
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for specifying which information to display, and for setting how
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ffprobe will show it.
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ffprobe output is designed to be easily parsable by a textual filter,
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and consists of one or more sections of a form defined by the selected
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writer, which is specified by the @option{print_format} option.
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Metadata tags stored in the container or in the streams are recognized
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and printed in the corresponding "FORMAT" or "STREAM" section.
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@c man end
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@chapter Options
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@c man begin OPTIONS
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@include avtools-common-opts.texi
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@section Main options
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@table @option
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@item -f @var{format}
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Force format to use.
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@item -unit
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Show the unit of the displayed values.
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@item -prefix
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Use SI prefixes for the displayed values.
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Unless the "-byte_binary_prefix" option is used all the prefixes
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are decimal.
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@item -byte_binary_prefix
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Force the use of binary prefixes for byte values.
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@item -sexagesimal
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Use sexagesimal format HH:MM:SS.MICROSECONDS for time values.
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@item -pretty
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Prettify the format of the displayed values, it corresponds to the
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options "-unit -prefix -byte_binary_prefix -sexagesimal".
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@item -of, -print_format @var{writer_name}[=@var{writer_options}]
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Set the output printing format.
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@var{writer_name} specifies the name of the writer, and
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@var{writer_options} specifies the options to be passed to the writer.
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For example for printing the output in JSON format, specify:
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@example
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-print_format json
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@end example
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For more details on the available output printing formats, see the
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Writers section below.
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@item -show_data
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Show payload data, as an hexadecimal and ASCII dump. Coupled with
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@option{-show_packets}, it will dump the packets' data. Coupled with
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@option{-show_streams}, it will dump the codec extradata.
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The dump is printed as the "data" field. It may contain newlines.
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@item -show_error
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Show information about the error found when trying to probe the input.
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The error information is printed within a section with name "ERROR".
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@item -show_format
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Show information about the container format of the input multimedia
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stream.
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All the container format information is printed within a section with
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name "FORMAT".
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@item -show_format_entry @var{name}
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Like @option{-show_format}, but only prints the specified entry of the
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container format information, rather than all. This option may be given more
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than once, then all specified entries will be shown.
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@item -show_packets
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Show information about each packet contained in the input multimedia
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stream.
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The information for each single packet is printed within a dedicated
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section with name "PACKET".
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@item -show_frames
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Show information about each frame contained in the input multimedia
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stream.
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The information for each single frame is printed within a dedicated
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section with name "FRAME".
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@item -show_streams
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Show information about each media stream contained in the input
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multimedia stream.
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Each media stream information is printed within a dedicated section
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with name "STREAM".
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@item -count_frames
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Count the number of frames per stream and report it in the
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corresponding stream section.
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@item -count_packets
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Count the number of packets per stream and report it in the
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corresponding stream section.
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@item -show_private_data, -private
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Show private data, that is data depending on the format of the
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particular shown element.
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This option is enabled by default, but you may need to disable it
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for specific uses, for example when creating XSD-compliant XML output.
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@item -show_program_version
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Show information related to program version.
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Version information is printed within a section with name
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"PROGRAM_VERSION".
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@item -show_library_versions
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Show information related to library versions.
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Version information for each library is printed within a section with
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name "LIBRARY_VERSION".
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@item -show_versions
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Show information related to program and library versions. This is the
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equivalent of setting both @option{-show_program_version} and
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@option{-show_library_versions} options.
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@item -bitexact
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Force bitexact output, useful to produce output which is not dependent
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on the specific build.
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@item -i @var{input_file}
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Read @var{input_file}.
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@end table
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@c man end
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@chapter Writers
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@c man begin WRITERS
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A writer defines the output format adopted by @command{ffprobe}, and will be
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used for printing all the parts of the output.
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A writer may accept one or more arguments, which specify the options to
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adopt.
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A description of the currently available writers follows.
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@section default
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Default format.
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Print each section in the form:
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@example
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[SECTION]
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key1=val1
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...
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keyN=valN
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[/SECTION]
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@end example
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Metadata tags are printed as a line in the corresponding FORMAT or
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STREAM section, and are prefixed by the string "TAG:".
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This writer accepts options as a list of @var{key}=@var{value} pairs,
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separated by ":".
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A description of the accepted options follows.
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@table @option
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@item nokey, nk
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If set to 1 specify not to print the key of each field. Default value
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is 0.
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@item noprint_wrappers, nw
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If set to 1 specify not to print the section header and footer.
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Default value is 0.
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@end table
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@section compact, csv
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Compact and CSV format.
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The @code{csv} writer is equivalent to @code{compact}, but supports
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different defaults.
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Each section is printed on a single line.
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If no option is specifid, the output has the form:
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@example
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section|key1=val1| ... |keyN=valN
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@end example
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Metadata tags are printed in the corresponding "format" or "stream"
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section. A metadata tag key, if printed, is prefixed by the string
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"tag:".
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This writer accepts options as a list of @var{key}=@var{value} pairs,
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separated by ":".
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The description of the accepted options follows.
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@table @option
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@item item_sep, s
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Specify the character to use for separating fields in the output line.
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It must be a single printable character, it is "|" by default ("," for
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the @code{csv} writer).
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@item nokey, nk
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If set to 1 specify not to print the key of each field. Its default
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value is 0 (1 for the @code{csv} writer).
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@item escape, e
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Set the escape mode to use, default to "c" ("csv" for the @code{csv}
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writer).
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It can assume one of the following values:
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@table @option
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@item c
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Perform C-like escaping. Strings containing a newline ('\n'), carriage
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return ('\r'), a tab ('\t'), a form feed ('\f'), the escaping
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character ('\') or the item separator character @var{SEP} are escaped using C-like fashioned
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escaping, so that a newline is converted to the sequence "\n", a
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carriage return to "\r", '\' to "\\" and the separator @var{SEP} is
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converted to "\@var{SEP}".
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@item csv
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Perform CSV-like escaping, as described in RFC4180. Strings
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containing a newline ('\n'), a carriage return ('\r'), a double quote
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('"'), or @var{SEP} are enclosed in double-quotes.
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@item none
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Perform no escaping.
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@end table
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@item print_section, p
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Print the section name at the begin of each line if the value is
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@code{1}, disable it with value set to @code{0}. Default value is
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@code{1}.
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@end table
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@section flat
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Flat format.
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A free-form output where each line contains an explicit key=value, such as
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"streams.stream.3.tags.foo=bar". The output is shell escaped, so it can be
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directly embedded in sh scripts as long as the separator character is an
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alphanumeric character or an underscore (see @var{sep_char} option).
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This writer accepts options as a list of @var{key}=@var{value} pairs,
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separated by ":".
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The description of the accepted options follows.
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@table @option
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@item sep_char, s
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Separator character used to separate the chapter, the section name, IDs and
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potential tags in the printed field key.
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Default value is '.'.
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@item hierarchical, h
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Specify if the section name specification should be hierarchical. If
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set to 1, and if there is more than one section in the current
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chapter, the section name will be prefixed by the name of the
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chapter. A value of 0 will disable this behavior.
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Default value is 1.
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@end table
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@section ini
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INI format output.
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Print output in an INI based format.
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The following conventions are adopted:
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@itemize
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@item
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all key and values are UTF-8
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@item
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'.' is the subgroup separator
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@item
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newline, '\t', '\f', '\b' and the following characters are escaped
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@item
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'\' is the escape character
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@item
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'#' is the comment indicator
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@item
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'=' is the key/value separator
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@item
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':' is not used but usually parsed as key/value separator
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@end itemize
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This writer accepts options as a list of @var{key}=@var{value} pairs,
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separated by ":".
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The description of the accepted options follows.
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@table @option
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@item hierarchical, h
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Specify if the section name specification should be hierarchical. If
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set to 1, and if there is more than one section in the current
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chapter, the section name will be prefixed by the name of the
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chapter. A value of 0 will disable this behavior.
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Default value is 1.
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@end table
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@section json
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JSON based format.
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Each section is printed using JSON notation.
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This writer accepts options as a list of @var{key}=@var{value} pairs,
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separated by ":".
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The description of the accepted options follows.
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@table @option
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@item compact, c
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If set to 1 enable compact output, that is each section will be
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printed on a single line. Default value is 0.
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@end table
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For more information about JSON, see @url{http://www.json.org/}.
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@section xml
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XML based format.
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The XML output is described in the XML schema description file
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@file{ffprobe.xsd} installed in the FFmpeg datadir.
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An updated version of the schema can be retrieved at the url
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@url{http://www.ffmpeg.org/schema/ffprobe.xsd}, which redirects to the
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latest schema committed into the FFmpeg development source code tree.
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Note that the output issued will be compliant to the
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@file{ffprobe.xsd} schema only when no special global output options
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(@option{unit}, @option{prefix}, @option{byte_binary_prefix},
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@option{sexagesimal} etc.) are specified.
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This writer accepts options as a list of @var{key}=@var{value} pairs,
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separated by ":".
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The description of the accepted options follows.
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@table @option
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@item fully_qualified, q
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If set to 1 specify if the output should be fully qualified. Default
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value is 0.
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This is required for generating an XML file which can be validated
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through an XSD file.
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@item xsd_compliant, x
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If set to 1 perform more checks for ensuring that the output is XSD
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compliant. Default value is 0.
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This option automatically sets @option{fully_qualified} to 1.
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@end table
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For more information about the XML format, see
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@url{http://www.w3.org/XML/}.
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@c man end WRITERS
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@chapter Timecode
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@c man begin TIMECODE
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@command{ffprobe} supports Timecode extraction:
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@itemize
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@item
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MPEG1/2 timecode is extracted from the GOP, and is available in the video
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stream details (@option{-show_streams}, see @var{timecode}).
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@item
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MOV timecode is extracted from tmcd track, so is available in the tmcd
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stream metadata (@option{-show_streams}, see @var{TAG:timecode}).
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@item
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DV, GXF and AVI timecodes are available in format metadata
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(@option{-show_format}, see @var{TAG:timecode}).
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@end itemize
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@c man end TIMECODE
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@include syntax.texi
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@include decoders.texi
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@include demuxers.texi
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@include protocols.texi
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@include indevs.texi
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@ignore
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@setfilename ffprobe
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@settitle ffprobe media prober
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@c man begin SEEALSO
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ffmpeg(1), ffplay(1), ffserver(1) and the FFmpeg HTML documentation
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@c man end
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@c man begin AUTHORS
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The FFmpeg developers
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@c man end
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@end ignore
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@bye
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